Sousaphones are type of tuba designed for the American band leader and composer (most famously of marches) John Philip Sousa. As the instrument is effectively worn by the player it makes playing whilst marching or standing considerably easier than it is when playing a conventional tuba. Usually pitched in low Bb, the bell of the sousaphone is forward facing to maximise projection. Originally made entirely from brass, modern instruments are very often made with fibre glass bells which reduce the weight considerably in a bid to make them more user friendly.

A sousaphone is a large brass instrument that is often used in marching bands and other outdoor performances. It is a type of tuba that is designed to be easier to carry and play while marching. The sousaphone is named after John Philip Sousa, a famous American composer and conductor. It has a wide conical bore and a flared bell that faces forward, which helps to project the sound in outdoor settings. The sousaphone is played by blowing air into a mouthpiece and using valves to change the pitch.

A helicon is another type of brass instrument that is similar to the sousaphone. It is also commonly used in marching bands and has a similar shape and sound. The main difference between the helicon and the sousaphone is the direction of the bell. In a helicon, the bell faces upward instead of forward. This design allows the sound to project more vertically, making it suitable for indoor performances or situations where a more focused sound is desired.

Both the sousaphone and the helicon are important instruments in marching bands, providing a deep, rich sound that adds depth and power to the ensemble. They are typically played in the lower register and are known for their strong and resonant tones. These instruments require a significant amount of breath control and physical strength to play, as they are larger and heavier than other brass instruments. Their distinctive appearance and powerful sound make them iconic symbols of marching bands around the world.